-er a-a a-b aaa aab aae aah aar aau ab- aba abb abe abh abr abu aea aeb aee aeh aer aeu aha ahb ahe ahh ahr ahu ar- ara arb are arh arr aru au- aua aub aue auh aur b-u baa bab bae bah bar bau bba bbb bbe bbh bbr bbu be- bea beb bee beh ber beu bha bhb bhe bhh bhr bhu bra brb bre brh brr bru bua bub bue buh bur buu eaa eab eae eah ear eau eba ebb ebe ebh ebr ebu eea eeb eee eer eha ehb ehe ehh ehr ehu era erb ere erh err eru eu- eua eub eue eur haa hab hae hah har hau hba hbb hbe hbh hbr hbu he- hea heb hee heh her heu hha hhb hhe hhh hhr hhu hr- hra hrb hre hrh hrr hru hua hub hue huh hur huu ra- raa rab rae rah rar rau rba rbb rbe rbh rbr rbu re- rea reb ree reh rer reu rh- rha rhb rhe rhh rhr rhu rra rrb rrh rrr rru rua rub rue ruh rur ruu ua- uaa uab uae uah uar uau uba ubb ube ubh ubr ubu uea ueb uee ueh uer uha uhb uhe uhh uhr uhu ur- ura urb ure urr uru uua uue uur uuu